This product is an extension module (device module) that adds digital signal input / output interface to various controllers.Connect to the F & Amp; EIT series I/O controller module CPU-CAXX (FIT) GY, microcontroller unit CPU-SBXX (FIT) GY.With one module, you can input up to 16 photospappla insulation and up to 16 photocapula insulation output.(Input: 12-24VDC specifications, output: 12 to 48VDC specifications)- [Extended module] Bus specification F & Amp; EIT Stack Size F & Amp; EIT 1u Used connector - [Digital input/output] number of input points 16 points Output points 16 points two -way score - Response speed (input) 1msec (max.) Response speed (output) 1msec (max.) Operate voltage (input) 12-24VDC Operate voltage (output) 12-48VDC input circuit Photoba plastic insulation input (compatible with sink and source output) Output circuit Photoba Plastic Insulation Open Collector Output (Sink Type) Built -in power supply -